diff options
Diffstat (limited to 'drivers/video/fbdev/sa1100fb.c')
| -rw-r--r-- | drivers/video/fbdev/sa1100fb.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/video/fbdev/sa1100fb.c b/drivers/video/fbdev/sa1100fb.c index 4900b37d2240..89dd7e02197f 100644 --- a/drivers/video/fbdev/sa1100fb.c +++ b/drivers/video/fbdev/sa1100fb.c @@ -178,6 +178,7 @@ #include <linux/dma-mapping.h> #include <linux/mutex.h> #include <linux/io.h> +#include <linux/clk.h> #include <video/sa1100fb.h> @@ -416,9 +417,9 @@ sa1100fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) var->transp.offset); #ifdef CONFIG_CPU_FREQ - dev_dbg(fbi->dev, "dma period = %d ps, clock = %d kHz\n", + dev_dbg(fbi->dev, "dma period = %d ps, clock = %ld kHz\n", sa1100fb_display_dma_period(var), - cpufreq_get(smp_processor_id())); + clk_get_rate(fbi->clk) / 1000); #endif return 0; @@ -592,9 +593,10 @@ static struct fb_ops sa1100fb_ops = { * Calculate the PCD value from the clock rate (in picoseconds). * We take account of the PPCR clock setting. */ -static inline unsigned int get_pcd(unsigned int pixclock, unsigned int cpuclock) +static inline unsigned int get_pcd(struct sa1100fb_info *fbi, + unsigned int pixclock) { - unsigned int pcd = cpuclock / 100; + unsigned int pcd = clk_get_rate(fbi->clk) / 100 / 1000; pcd *= pixclock; pcd /= 10000000; @@ -673,7 +675,7 @@ static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_ LCCR2_BegFrmDel(var->upper_margin) + LCCR2_EndFrmDel(var->lower_margin); - pcd = get_pcd(var->pixclock, cpufreq_get(0)); + pcd = get_pcd(fbi, var->pixclock); new_regs.lccr3 = LCCR3_PixClkDiv(pcd) | fbi->inf->lccr3 | (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) | (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL); @@ -787,6 +789,9 @@ static void sa1100fb_enable_controller(struct sa1100fb_info *fbi) fbi->palette_cpu[0] &= 0xcfff; fbi->palette_cpu[0] |= palette_pbs(&fbi->fb.var); + /* enable LCD controller clock */ + clk_prepare_enable(fbi->clk); + /* Sequence from 11.7.10 */ writel_relaxed(fbi->reg_lccr3, fbi->base + LCCR3); writel_relaxed(fbi->reg_lccr2, fbi->base + LCCR2); @@ -831,6 +836,9 @@ static void sa1100fb_disable_controller(struct sa1100fb_info *fbi) schedule_timeout(20 * HZ / 1000); remove_wait_queue(&fbi->ctrlr_wait, &wait); + + /* disable LCD controller clock */ + clk_disable_unprepare(fbi->clk); } /* @@ -1009,7 +1017,6 @@ sa1100fb_freq_transition(struct notifier_block *nb, unsigned long val, void *data) { struct sa1100fb_info *fbi = TO_INF(nb, freq_transition); - struct cpufreq_freqs *f = data; u_int pcd; switch (val) { @@ -1018,7 +1025,7 @@ sa1100fb_freq_transition(struct notifier_block *nb, unsigned long val, break; case CPUFREQ_POSTCHANGE: - pcd = get_pcd(fbi->fb.var.pixclock, f->new); + pcd = get_pcd(fbi, fbi->fb.var.pixclock); fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd); set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE); break; @@ -1225,6 +1232,13 @@ static int sa1100fb_probe(struct platform_device *pdev) if (!fbi) goto failed; + fbi->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(fbi->clk)) { + ret = PTR_ERR(fbi->clk); + fbi->clk = NULL; + goto failed; + } + fbi->base = ioremap(res->start, resource_size(res)); if (!fbi->base) goto failed; @@ -1277,6 +1291,8 @@ static int sa1100fb_probe(struct platform_device *pdev) failed: if (fbi) iounmap(fbi->base); + if (fbi->clk) + clk_put(fbi->clk); kfree(fbi); release_mem_region(res->start, resource_size(res)); return ret; |